import 'dart:ui';

class ColorHelper {
  /// 十六进制颜色
  /// hex，十六进制值，例如：0xffffff，
  /// alpha，透明度 [0.0,1.0] 
  static Color hexColor(int hex, {double alpha = 1}) {
    if (alpha < 0)
      alpha = 0;
    else if (alpha > 1) alpha = 1;

    return Color.fromRGBO((hex & 0xFF0000) >> 16, (hex & 0x00FF00) >> 8,
        (hex & 0x0000FF) >> 0, alpha);
  }
}
